<!DOCTYPE html>
<html>

<head>
  <meta charset="UTF-8">
  <!--引入Vue-->
  <script type="text/javascript" src="../js/vue.js"></script>
  <title></title>
</head>

<body>
  <!--准备好一个容器-->
  <div class="root">
    <ul>
      <button @click="updateMei">更新马冬梅的信息</button>
      <li v-for="p in persons" :key="p.id">
        {{p.name}}-{{p.age}}--{{p.sex}}
      </li>
    </ul>
  </div>

  <script type="text/javascript">
    Vue.config.productionTip = false;

    new Vue({
      el: '.root',
      data: {
        persons: [
          { id: '001', name: '马冬梅', age: 19, sex: '女' },
          { id: '002', name: '周冬雨', age: 20, sex: '女' },
          { id: '003', name: '周杰伦', age: 21, sex: '男' },
          { id: '003', name: '温兆伦', age: 22, sex: '男' }
        ]
      },
      methods: {
        updateMei(){
          //下面代码奏效
          // this.persons[0].name='马老师'
          // this.persons[0].age=40
          // this.persons[0].sex='男'
          //不奏效
          //this.persons[0]={id:001,name:'马老师',age:40,sex:男}
        }
      },
    })
  </script>
</body>

</html>